Their crypto is state of the art, but their ops sec threat model does not include “we’ll torture you or go to your mobile operator and their would cooperate fully”. So signal is good for USA, not so good for 3rd world countries. This people making decisions in Signal live in a different world then most of the people who need secure comms. Well telegram have us covered. Sadly, if you stop trusting Durov - you are screwed. Signal is much better in that regard.